table{
    width: 100%;
    border-collapse:collapse ;
}
th,
td{
    /*上下左右*/
    padding: 0.5rem 0;
    text-align: center;
}
thead{
    background: cornsilk;
    color: cyan;
}
tbody tr:nth-child(odd){
    background: deepskyblue;
}
tbody tr:hover{
    color: cyan;
    background:greenyellow;
}